Dust-collector.



No. 673,547. Patented May 7, I90l. F. PRINZ. DUST COLLECTOR.(Application filed May 24, 1899.

2 Sheats$heot I.

(No Model No. 673,547. Patented May 7, I901. F PRINZ DUST- COLLECTOR.

(Application filed May 24 1899.;

2 SheetsSheef 2.

(No Model.)

Cute aw UNITED STATES PATENT OFFICE.

FAUSTIN PRINZ, or MILWAUKEE, WISCONSIN.

DUST- COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 673,547, dated May 7,1901.

Application filed May 24, 1899. Serial No. 718,066., (No modelJ To a.whom it may concern:

Be it known that I, FAUsrIN PRINZ, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofVisconsin, have invented certain new and useful ImprovementsinDust-Oollectors; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the charactersof reference marked thereon, which form a part of this specification.

My invention relates to dust collectors, more particularly to that classof dust-collectors in which a textile bag or tube is used for collectingthe dust while permitting the air to pass through the material, the bagor tube being connected at opposite ends to suitable sustaining meansforinstance, such as are illustrated in the patent granted to me May 12,1896, No. 560,107. I-Ieretofore in constructing machines in accordancewith the invention illustrated and described in that patent the druminto which the dust-laden air is conducted has been made of wood and thelower ends of the tubes or bags connected to the drum about the openingstherein, while the upper ends of the tubes or bags have been closed by awooden block or head, which blocks or heads have been connected to awooden cross-bar, by depressing which the tubes or bags would becollapsed and then suddenly distended, so as to jar or shake the' fabriccomposing the tubes or bags, and thus dislodge the dust therefrom. Inpractice it has been found that in time under some conditions the woodenheads to the tubes or bags will shrink more or less, and also that thewooden bar to which the heads are connected will to some extent shrink,which will cause the wooden blocks or heads to the dust-tubes to loosenat their connection with the tubes. It has also been found in practicethat the wood composing the surface of the dust-receiving drum willshrink more or less under some conditions, and thus to some extentimpair the close connection or joint between the lower or receiving endsof the tubes or bags and the drum.

To overcome the objections mentioned,

where the machine may be used under conditions calculated to produce theobjections noted and for other purposes and to provide a betterconnection between the lower ends of the dust tubes or bags and thedrumto meet such conditions and also to provide an improved closing heador cap for the opposite ends of the tubes or bags and also an improvedconnection between the same and the cross-bar, to which the heads orcaps of the tubes are attached, are some of the objects of thisinvention.

Tothe accomplishment of the foregoing and such other objects as mayhereinafter appear the invention consists in the construction and alsoin the combination of parts, which will be hereinafter particularlydescribed, and then sought to be clearly defined by the claims,reference being had to the accompanying drawings, forming a pal-thereof,

and in Which Figure 1 is a vertical section through a ma chine havingmyinvention embodied therein. Fig. 2 is a vertical sect-ion through adust-collecting bag with my attachments. Fig. 3 is a top plan View ofthe bag cap or head. Fig. 4 is a side view of the same, showing aportion of the bag and its securing-ring. Fig. 5 is a side View of oneof the collars with the bag and binding-rings broken away; and Fig.

6 is a plan view of one of the collars.

In the accompanying drawings the numeral 1 designates a dust-receivingdrum, which may be supported upon suitable standards and rotated bysuitable means, for instance, as illustrated in my patent beforementioned, said drum having dust-collecting bags or tubes 2 connectedtherewith to receive the dust-laden air from the openings in the drumand the opposite ends of the bags connected to supporting cross-bars 3,which may be sustained and jarred as in my said patent or otherwise.

In the present form of my invention I make the drum 1 of metalsay ofsheet-iron preferably about one-eighth of an inch thick, instead ofmaking it of wood, which, while perfectly satisfactory under ordinaryconditions, may not be so much so under special conditions, where theair is quite hot or where the material to be blown is very coarse andharsh. I attach the receiving ends of the tubes or bags 2 to the drum bymeans of metal collars 4, which are provided with ears 5, through whichrivets are passed, so as to secure the collars to the drum, the collarsfitting around the openings made in the periphery of the drum.The-outeredgeofthecollarsisformed with a lip or flange 6, made byoutturning the edge or otherwise, as may be preferred. Over this collaris fitted the receiving end of the collecting tube or bag, said end ofthe tube being provided with an expansible ring or bead 7, which may beand preferably is a split ring, being, for instance, split at a, sothat'it;

will expand in passing over the flanged edge fiangeand the ring, whichis secured to the tube or bag, thus preventing the possibility of thebag or tube being accidentally withdrawn from the collar and which splitring may for convenience be designated as an expansible clam ping-ring;but it is to be understood that I do not limit myself to the use of thetwo split rings under conditions where it is found that one will answerthe purpose. By making the drum of sheet metal and forming the collarsas specified and securing them to the periphery of the drum there is nopossibility of shrinkage, and the joint between the collecting tubes orbags and drum will always remain the same, and there will be no leakageat the lower ends of the tubes or bags under the special conditions thatmay sometimes exist, as before stated.

The outer ends of the collecting tubes or bags instead of being providedwith wooden blocks or heads, as usual, and which may answer all purposesunder ordinary conditionss, are provided with metal heads or caps 9.These heads or caps I make of steel, stamped into shape and formed withdepending fla nges 10, which preferably are made with a circumferentialgroove 11, so thatthe ends of the tubes or bags may be drawn over theflanges and clamped thereto by binding wires 12, which will lie in thegrooves of the flanges and press the material of the tubes or bagstherein, so as to make a close joint. By mak-' ing these heads or capsof non-shrinkable material-for instance, of metal-a close joint isalways maintained between the caps or heads and tubes, and there can beno leakage of dust-laden air at such point under any circumstances. Inorder to effect a somewhatelastic connection between the caps or headsof the tubes and the cross-bars to which they are connected by screws orbolts 13, I make a depression 14 in each head or cap and pass throughthe head or cap at such point the bolt or screw 13, which connects thecap to the cross-bar, the threaded end of the bolt taking into a nut15,, which may be brazed to or otherwise made as a part of the head orcap and is located at the depressed portion of the head, so that whenthe screw or boltis screwed home the cap is clamped to the cross-bar bysomething of an elastic connection which will compensate for or take upany shrinkage that may occur in the cross-bar, and will thus alwaysmaintain the bolt in a tight condition, even if the wood shrinks underspecial conditions. The depression in the cap or head may extend over agreater or less area of the surface to the head. I have mentioned thehead as made of steel, but the metal used for the head may be other thansteel without departing from this feature of my invention, althoughsteel is preferred, as it is considered best for the purpose.

I have illustrated the features of my invention as applied to the typeof dust-collectors illustrated by my patent hereinbefore mentioned, as Icontemplate using the invention with that type of machine; but it isobvious that the invention is not limited to that form, as it may beused in any form of machine to which it is adapted to be used withadvantage. It is also obvious that changes can be made in the details ofthe collar and its attachment to the drum and also in the caps or headsto the dust tubes or bags without departing from the essentials of somefeatures of the invention.

Having described my invention and set forth its merits, what I claimis 1. A dust-collector comprising a drum to receive dust-laden air, saiddrum having openings in its periphery and shouldered collars extendingbeyond the openings, dust-collecting tubes fitting to said collars, acontractile split ring interlocking with the shoulder of each collar,for securing the tube thereto, metallic heads closing the outer ends ofthe tubes, and wooden crossbars having said heads secured thereto,substantially as described.

2. A dust-collector comprising a metallic drum to receive dust-laden airformed with openings in its periphery and provided with metallicshouldered collars extending beyond the openings in the periphery of thedrum, dust-collecting tubes fitting to said collars, means securing thetubes to the collars, elastic metallic heads closing the outer ends ofthe tubes, and cross-bars to which said heads are connected,substantially as described.

3. A dust-collector comprising a rotatable drum with openings in itsperiphery and provided with shouldered collars extending beyond saidopenings, porous dust-collecting tubes fitting to said collars, acontractile split ring interlocking with the shoulder of each of thecollars and binding the tube to the collar, elastic heads for closingone end of the tubes, cross-bars extending across said heads, and meansfor clamping the heads and crossbars together, substantially asdescribed.

4. In a dust-collector having porous dustcollecting tubes, a hollowsheet-metal head for closing one end of a tube and having the tubesecured to a flange formed as a part of the head, in combination withmeans for bolding the other end of the tube, substantially as described.

'5. 'In a dust-collector having porous dustcollecting tubes, a head forclosing one end of a tube, saidhead being formed of elastic sheet metaland having the tube secured thereto in combination with means for bolding the other end of the tube, substantially as described.

6. In a dust-collector having porous dustcollecting tubes, a sheet-metalhead for-closing one end of a tube, said head having its central portiondepressed to render the same yielding or elastic, in combination withmeans a centrally-depressed portion,- a supportingbar passingacross themetal heads, and means passing through the cross-bar and depressedportion of the heads for clamping the crossbar and heads together,substantially as described. r g L In testimony whereof I affix mysignature in presence of two witnesses.

FAUSTIN PRINZ.

'Witnesses:

W. F. FILTER, RoBT. ;W. OLDENBURG.

